The European Journal of Mineral Processing and Environmental Protection
نویسنده
چکیده
Oxidation characteristics of natural pyrite were investigated in phosphoric acid solutions. Using hydrogen peroxide as an oxidant, the effect of particle size, reaction temperature, and hydrogen peroxide concentration were examined. The oxidation process can be described by the heterogeneous kinetic model in which the surface decomposition reaction is the rate-determining step. An activation energy of 49kJ/mol for pyrite oxidation is estimated. It was found that the smaller the particle size or the higher the reaction temperature, the faster the oxidation proceeds, as anticipated. © 2004 SDU. All rights reserved.
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